dsh-width-tiers

Chat content-width tiers for the DeepSeek Harness Web GUI.

English | 中文

Tiers

Tier	Content width	Sidebar
Standard 标准	App default: max(680px, min(column × 0.64, 920px))	unchanged
Medium 中等	1120px	unchanged
Wide 宽	1280px	unchanged
Ultra 超宽	1400px	unchanged
Full 全宽	max(640px, column − 176px)	collapsed to icon rail
Custom 自定义	width recorded from a native drag	unchanged

Fixed and custom widths are clamped by the app to max(640px, column − 176px); the standard tier follows the app default (680–920px). On a narrow window a wider fixed tier therefore behaves like full, and the menu shows the reachable maximum for fixed tiers (1280px reads 640px on an 800px column).

Features

• Uses the app's native width axis (--dsh-chat-user-width and dsh.conversation.contentWidth), so the built-in drag handles keep working.
• Persists the selected tier and restores it on the next visit.
• Follows Settings → Language (中文 / English / 日本語 / Español / Français / Deutsch / Русский / Português), including the Settings plugin card's title and summary (locale/<lang>.json).
• Menu supports ArrowUp/Down, Home/End, Escape and Tab, with focus restoration.
• Tier changes sync across tabs.
• Respects prefers-reduced-motion.
• Never touches the right panel. Only full collapses the left sidebar, and you can expand it again at any time.

Install

dsh plugin --profile web add dsh-width-tiers

Restart dsh web, then hard-refresh the page. A six-bar picker appears at the bottom-right.

For a local checkout:

dsh plugin --profile web add link:/path/to/dsh-width-tiers

Usage

• Click the picker and choose a tier.
• Picking Custom before the first drag opens a guide at the right edge; drag a native handle to record a width.
• Dragging any native handle switches to Custom; the plugin steps aside while you drag.
• Standard clears the width preference and returns to the app default.
• Full collapses the left sidebar; the icon rail stays available.

How it works

• Mounts the picker into the frame-wide shell.overlay slot; the plugin fiber owns the controller lifetime, so no listeners or timers outlive it.
• The controller publishes an immutable snapshot (tier, menu, guide); the React picker renders it and dispatches actions, so the view can remount without rebuilding observers.
• Locates the conversation body that declares --dsh-chat-content-width (prefers [data-conversation-content], skips the right sidebar's embedded conversation), then writes --dsh-chat-user-width on its parent.
• Stores the configured target in the app preference; only the inline width is clamped to max(640px, column − 176px).
• Watches the column with ResizeObserver so full follows sidebar, rightbar and window changes.
• Drives panels through ctx.layout and registers copy through ctx.locale.

Compatibility

• DSH Web 0.2.x with a web profile (shell.overlay slot and slots service).
• Width axis checked against DSH 0.2.2-alpha.3: 640px floor, 176px handle budget, --dsh-chat-* variables, data-width-handle, layout/locale services.
• Narrow screens: the picker hides while alpha.3's sidebar drawer (data-sidebar-drawer) is open and follows the on-screen keyboard.

Development

pnpm install
pnpm build        # src/ -> lib/ (host entry + loader-wrapped client bundle)
pnpm typecheck
pnpm test         # vitest: controller (jsdom) + picker component suites
pnpm verify:client

The sources live in src/ (src/index.ts is the no-op host entry, the feature lives in src/client/); lib/ is the built, published payload. The vitest suites import the sources directly: the controller runs under jsdom and the picker is rendered with Testing Library, so no live DSH instance is required. verify:client checks the built bundle contract. Development needs Node 22+ and pnpm.

Notes

• Wider fixed tiers are clamped on narrow windows.
• A custom width dragged on a narrow window is clamped by the app before it is recorded.

License

MIT — see LICENSE. Copyright (c) 2026 aaronlei.